Lots of native English speakers write ‘baby’ without an article.

As a native speaker of a Slavic language I can confirm that articles are something that I often seem to be getting wrong when I am writing (and speaking) English.

They seem like an unneeded extra, from the perspective of Slavic languages, where the information that they give is most often easily inferred from the context or the construction of the sentence.

Indian languages also lack articles - my mother immigrated to USA over 30 years ago and I still have to add in articles sometimes when I proofread something she writes.